石こう円板の曲げ破壊 : 周辺単純支持

概要

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The purpose of this study was to investigate the bending strength of a disc made of brittle materials. In the experiment, a plaster disc with a hole at the center was simply supported along the outer edge of the disc, and was subjected to a uniformly distributed load from a liquid pressure on one side of the disc. From the experimental data, it was found that the rupture pressure of the disc with a constant ratio of thickness to diameter was influenced not only by the diameter ratio of the hole and the disc, but also by the diameter of the disc itself. Then it was found that, while keeping the diameter ratio constant, the strength of the disc decreased as the diameter of the disc increased. We also made a theoretical analysis taking into account the effect of the "surface layer". That analysis coincided well with this experiment. From the analysis and experiment, it was concluded that there was the "size effect" in the strength of the disc.
社団法人日本機械学会の論文
1989-05-25